//
// (C) Copyright 2009 Irantha Suwandarathna (irantha@gmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use _in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions _in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer _in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


using System;
using EffiProzDB.Lib;

namespace EffiProzDB.DataTypes
{

    /**
     * Java representation of a BINARY field value. <p>
     *
     * A Binary object instance always wraps a non-null byte[] object; all
     * NULL SQL field values are represented internally by HSQLDB as Java null.
     *
     * @author fredt@users
     * @version 1.7.2
     * @since 1.7.2
     */
    public class Binary
    {

        private byte[] data;
        int hash;

        /**
         * This constructor is used inside the engine when an already serialized
         * byte[] is read from a file (.log, .script, .data or text table source).
         * In this case clone is false.
         *
         * When a byte[] is submitted as a parameter of PreparedStatement then
         * clone is true.
         */
        public Binary(byte[] data, bool clone)
        {

            if (clone)
            {
                data = (byte[])data.Clone();
            }

            this.data = data;
        }

        public byte[] getBytes()
        {
            return data;
        }

        public byte[] getClonedBytes()
        {
            return (byte[])data.Clone();
        }

        public int getBytesLength()
        {
            return data.Length;
        }

        public override bool Equals(Object other)
        {

            if (other == this)
            {
                return true;
            }

            if (!(other is Binary))
            {
                return false;
            }

            if (data.Length != ((Binary)other).data.Length)
            {
                return false;
            }            

            return ArrayUtil.containsAt(data, 0, ((Binary)other).data);
        }

        public override int GetHashCode()
        {

            int h = 0;

            if (hash == 0)
            {
                for (int i = 0; i < data.Length; i++)
                {
                    h = 31 * h + data[i];
                }

                hash = h;
            }

            return hash;
        }

        public override string ToString()
        {
            return StringConverter.byteToHex(data);
        }
    }
}
